MAC address in Compact Framework

1.4 of the OpenNETCF code gets the information from the following P/Invoke call:

 [DllImport ("iphlpapi.dll", SetLastError=true)] public static extern int GetAdaptersInfo( byte[] ip, ref int size ); 

The physical address (returned as MAC address) I think is around about index 400 - 408 of the byte array after the call. So you can just use that directly if you don't want to use OpenNETCF (why though? OpenNETCF rocks more than stone henge!)

Wonderful P/Invoke.net gives a full example here.

Oh and to properly answer your question:

only using the Compact Framework

You cant. That's life with CF, if you want some fun try sending data with a socket synchronously with a timeout. :D

Here are the first three hits from a Google search for "MAC address in Compact Framework:

1. http://arjunachith.blogspot.com/2007/08/retrieving-mac-address-in-compact.html
2. http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=920417&SiteID=1
3. http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=188787&SiteID=1

Did none of those help?

Two out of three point to OpenNETCF as a way to do it.

If you can access the registry, try to find your adapter MAC Address under the LOCAL_MACHINE\Comm\PCI\***\Parms\MacAddress.

It may be a quick and dirty solution that doesn't involve the use of WMI or OpenNETCF ...

Add a reference to System.Management.dll and use something like:

Dim mc As System.Management.ManagementClass Dim mo As ManagementObject mc = New ManagementClass("Win32_NetworkAdapterConfiguration") Dim moc As ManagementObjectCollection = mc.GetInstances() For Each mo In moc If mo.Item("IPEnabled") = True Then ListBox1.Items.Add("MAC address " & mo.Item("MacAddress").ToString()) End If Next